Valve.



C. M. GIFFORD.

VALVE.

APPLICATION mu) JUNE 9.19:1.

1,278,905 Patented Sept. 17, 1918.

NITED STATES PAT NT OFFICE.

CHARLES M. GIFFORD, OF NEW BEDFORD, MASSACHUSETTS.

VALVE.

Specification of Letters Patent; Patented Sept. 1'7, 1918.

Application filed June a, 1917. Serial No; 173,870.

The primary object is to provide 'a valve construction wherein the valve elements are moved perpendicularly of their seats to and from the same so as to eliminate forcible rubbing of the valve elements across their seats. v

The invention further resides in the novel mounting of the valve plates'or elements and in the features of construction and the arrangements and combinations of parts clescribed in the following specification, and

'succintly defined in the appended claims,

reference being had to the accompanying drawing wherein Figure 1 is a vertical section through the improved valve;

Fig. '2 is a detailed elevation of a valve plate or element and its supporting collar; and

Fig. 3 is a horizontal section through the valve, as on line 33 of F ig; 2, showing the collar support.

Referring more in detail to the drawing, the numeral 1 designates the valve casing formed with a central valve chamber 2 which latter communicates, at its opposite sides with the passage or conduit 3, through the partitions 1. Each partition is provided with an opening into which is threaded a valve seat 5.

The valve casing is extended upwardly at its central portion for forming an extension 6 to the valve chamber 2, said upper chamber 6 being completed by the head or cap member 7 of hollow design. The top of this cap section is provided with an annular shoulder 8 on which is'threaded a bracket stand 9 having its upper end formed as a hearing 10 for the hand wheel 11. A sleeve bushing 12 is fixedly carried by the wheel and passes through the bearing 10 for engaging therebeneath, as at 13, to swivelly 7 connect said wheel to the stand.

The sleeve is internally threaded for engagement with the threads 14 0f the valve stem 15 which extends through a suitable packing gland 16, within the shoulder 8, and down through the cap member into the valve chamber On the lower end of the valve stem is mounted a double wedge 17 composed of two sections having opposing seats for the head 18' of the valve stem and secured together in a detachable manner by screws 19. The opposite outer faces of the double wedge converge downwardly and are slidably'guided 'in ways 20 that are formed on the inner opposing faces of the valve ele-' ments or disks 21. i 7

Each valve element has a pair'of arms 22 extending upwardly for securement, by screw bolts 23, to the bracket extensions 2% of a sectional collar 25, said bolts serving also as a fastener for the sections of the collar. The arms 22 project beyond the valve faces to engage the edges of the valve seats,

as at 22 to serve as a stop for properly positioning the valve elements relative to their seats. This collar is slidable on the valve stem and is held against rotation thereon by the cross key 26 which operates in a diametrical slot 2'7 through the bolt and is clamped between the collar sections. Above the collar the valve stem carries a shoulder 28 and between this shoulder and the; un-' derlying collar is a coiled spring 29 serving to yieldably hold the collar seated on'the wedge parts. A U-shaped stop member 30 is secured by screw 31 at'the bottom of the valve chamber and has upwardly extending stops 32 arranged in proximity to the respective valve seats 5; i

Iii-operation, with the parts related as depicted in Fig. 1, the valve is opened by revolving the hand wheel 11 which raises the valve stem, withdrawing the double wedge from between the valve elements and into engagement with the collar to lift the valve elements from their seats up into the chamber extension 6.

To close the valve, a reverse rotation is imparted to the wheel 11 which lowers the valve stem with its supported valves until the latter engages the stops 32 after which subsequent lowering of the stem drives the wedge along the guideways 20 to force the valve elements laterally and firmly to their seats.

c Consequently, the valve elements donot rub or abrade their seats and cause a rapid wearing thereof, but are seated by a lateral movement effected by the wedge.

The construction is, therefore, a practical one and the illustration discloses the prelferred embodiment of the invention but it is understood that further changes as fall within the scope of the appended claims may be resorted to to make the construction and manufacture simpler and more practical.

"What is claimed is: J

1. A valve including a casing having opposing valve seats, a valve stem having its inner end portion formed With a longitudinal slot therethrough, a collar slidable on the inner end of the valve stem, valve elements carried by the collar for engaging on the seats, means carried by the inner end of the valve stem for moving the valve elements to their seats, and meanscarried by the collar and engaged in the slot of the stem for limiting the sliding movement of said collar and to prevent rotation of the latter on the stem.

2. In a valve, a casing having a central valve chamber formed with opposing partitions each having an opening, a ring valve seat threaded inv each partition opening, a stop member arranged in the bottom of the chamber adjacent the seats, a pair of valve elements movable to and from between the seats and adapted to engage the stop mem her for being properly positioned for a sub sequent seating thereof, theinner opposing faces of the valve elements having relatively converging guidev 'ays, a double Wedge movable in the guideivays for shifting the valve elements, laterally to their seats, a stem connected to the Wedge for operating the latter, and means supporting the valve elements from the stem and cooperating withthe stop member for guiding the valve elements later- 3. In a valve, a casing having. a central valve chamber formed With opposing partitions each havingan opening, a ring valve Copies of this patent may be obtained for five cents each, by addressing the Washington, 11.0.

seat threaded in each partition opening, a stop member arranged in the bottom of the chamber adjacent the. seats, .a pair of valve elements movable to and from between the seats and adapted to engage the stop meinher for being properly positioned for a subsequent seating thereof, the inner opposing faces of the valve elements having relatively converging guideivays,adouble Wedge movable in the guidetvays for shifting the valve elements laterally to their seats, a stem connected to the Wedge for operating the latter, a collar slidable on the stem, and arms connecting the collar to the valve elements and extending beyond the faces of the latter to engage over the ring valve seats and cooperate with the stop member in guiding the valve elements laterally. r

l. A valve including a casing having opposing valve seats, a valve stem'having its inner end portion fOlTflGClWIltll a ciametrical slot, a pin disposed in the slot and projecting at each end therefrom, a. sectional collar slidable on the stem and clamping the pin between the collar sections, a valveelement carried by each collar section tor'cooperating with the respective seats, and means carried by the inner end of the stem for moving the valve elements to their seats 5. In a valve, a casing, opposing valve seats therein, a valve element for each seat,

a stem, a' Wedge part movable by the stem between the valve elements for seating the same, a collar support slidable'on the stem, and means connecting the collar support to the valve elements and extending beyond the latter to abut the edge of. the valve seats 7 for positioning the elements relative to their seats. 7

In testimony tvhereof I afliX-mysignature;

CHARLES M. Grrronn.

Commissioner of Patents, 

